Improvement in saw-filing machines



UNH-nn STATES PATENT Dertien.

.JOHN S. MGUNE, OF-SALElVI CITY, NEW JERSEY.`

lii/lPliOVEiViENT lN-SAWBFILING MACHINES.

Specification forming part of Letters Patent No. 413,698, dated August2, 1864.

To all whom it may concern:

, Be it known that I, JOHNS. MCCUNE, of Salem City, in the county ofSalem and State of New Jersey, have invented a new and ImprovedImplement or Device forFiling Saws; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, making a part of thisspecification, in which- Figure l is a side view of my invention, thefile-frame being in section, as indicated in the lines w w, Fig. 2; Fig.2, a transverse vertical section of the same taken in the line y y, Fig.l; Fig. 3, a plan or top view of thesame; Fig. 4, a detached View of thecenter, in which one end of the file is fitted.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention consists in the employment or use of a clamp inconnection with an adjustable sliding rile-frame and a gage, all ar'ranged in such a manner as to admit of saws being filed with thegreatest facility and in a perfect manner, even by a person not wellskilled in such work.

To enable those skilled in the art to fully understand and constructmyinvention, Iwill proceed to describe it.

A A represent two parallel bars, which constitute a clamp to hold thesaw to be filed. One of these bars, A, is made adjustable by means ofsetscrews c, the other bar, A, being Xed and attached permanently to abedpiece, B. The bars A A at one end are provided with a recess, b, tovreceive the sawhandle, so that the latter may not interfere with theproper adjustment of the saw-blade in the clamp. The adjustable bar Ahas a longitudinal dovetail cleat or projection, C, at its outer side,on which a slide, D, is fitted, and allowed to work freely to the rightand left, and to said slide D there is attached by a setscrew, c, asupport,- E, the main portion d of which is slightly curved from avertical line, lthe upper and lower parts, e e', being horizontal andprojecting from one side of d,

the set-screw c passing throughthe part e of the support into the slideD.

On the parte of the support there are secured two uprights, f f, whichare 'slotted vertically to receive the upper bar, g, of a fileframe E.This frame is of rectangular form,- and is composed of two upright bars,h h', connected by the bar g and a bar, g', the latter being below theformer. The bars g g are permanently framed in the upright bar h, butare secured in the bar h by set-screws t', and the lower bar, g', worksin a slotted pendant, j, attached to the under side of e.

G represents a file ofthe usual form employed for tiling saws. The backend of this file is fitted loosely in the lower end of the bar h of thele-frame, while the front end of said file is fitted in a center, k,which is placed in the bar h and is prevented from casually turning .bya set-screw, Z.

H represents a lever, which is attached by a fulcrum-pin, m, to theslide D, and has a spring, I, bearing upon it. This lever serves as agage to insure the teeth being retained in ling at an equal distanceapart.

The device is used as follows: The sawblade is secured in the clamp andthe leframe F is adj usted in a more or less oblique position with thesaw, according to the desired rake to begiven the saw-teeth. The firsttooth is led' by moving the frame F by hand, and the lever or gage Hfitted into the file-tooth, which gives the proper position for the leG, to act upon the next tooth but one, which, when filed, has the gageII adj usted in it, every alternate tooth being filed, and all of anequal depth, in consequence of the bar g serving lto limit the downwardmovement of the file-frame by coming in contact with the part e of thesupport E. The proper or desired hook7 is given the teeth by adjustingthe tile F in a more or less inclined position in its transversesection, which is done by turning it in the file-frame and securing itby the set-screw l.

Thus by this simple device a saw may be filed expeditiously and in aperfect manner,

even by a person not skilled inthe art. When the alternate teeth arefiled, having a rake in one direction, the frame is adjusted-in areverseoblique position to suit the intermediate teeth, which are led inthe same way as the others.

Having thus described my invention, what I with theuprights j' f, inconnection with the claim as new, and desire to secure by Letter bar gof the 1e-frame, all `arranged for the Patent, is purpose of regulatingthe depth of the le-out l. The clamp formed of the bars A A, in orlengthof the teeth, as set forth. combination with the slide D, {le-frame F,and JOHN S. MOCUNE. gage H, all arranged substantially as and for`VVitnesses: f the purpose set forth. BENJN. F. WooD,

f 2. The part e of the support E, provided Jos. K. LATCHAN.

